Ask your patient to make a quick decision about a small thing they’ve been worrying about.
Anxiety and worry stem from the risk of what will happen, not the certainty (we usually don’t have that). Most people are less content when they’re offered more choices because that gives them more cognitive work to do. Hence, more anxiety. Slim down the number of choices and choose quickly when the stakes are low. Once you do, this you regain control and then worry and anxiety recede.